What part of speech is haughtily in this phrase Ms. Minton looked at him and did not answer?

The word "haughtily" is not present in the phrase "Ms. Minton looked at him and did not answer."

Therefore, we can't determine its part of speech in this context.

If you'd like to know the part of speech of "haughtily" in a different context, please provide the full sentence or phrase where it appears.